Regulation quality for frequency response of turbine regulating system of isolated hydroelectric power plant with surge tank
Regulation quality for frequency response of turbine regulating system of isolated hydroelectric power plant with surge tank
复制标题
带调压室的孤立水电站水轮机调节系统频率响应的调节品质
DOI：
10.1016/j.ijepes.2015.05.043
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发表时间：
2015-12
影响因子：
5.2
通讯作者：
Yi Teng
中科院分区：
文献类型：
--
作者：
Wencheng Guo;Ji;ong Yang;Weijia Yang;Jieping Chen;Yi Teng
针对带调压室的孤立水电站，研究了负荷扰动下涡轮机调节系统频率响应的调节品质。首先，建立了涡轮机调节系统的完整数学模型，推导了阶跃负荷扰动下的五阶频率响应。然后，针对这一完整的五阶系统的频率响应，提出了基于主导极点的一次降阶和二次降阶方法。用该方法求解了完全五阶系统，并研究了系统的频率响应调节品质。结果表明，完整的五阶系统总是有一对共轭复主导极点和三个非主导极点。通过一次降阶得到的一次四阶等效系统保持主导极点几乎不变，因此可以代表和代替完整的五阶系统，明显上级其它四阶系统。原四阶等效系统由两个二阶子系统叠加而成，其中一个子系统对应于两个非主导的真实的极点（即首波），另一个子系统对应于一对主导的共轭复极点（即尾波）。在频率响应的波动过程中，首波衰减很快，主要在初始阶段起作用，而尾波衰减很慢，周期性波动，贯穿整个周期。利用尾波的二阶系统作为频率响应的主体来表征波动特性，可以对完整的五阶系统进行二次降阶。从尾波波动方程出发，导出了评价调节品质的最重要的动态性能指标--调节时间。涡轮机调节系统的不同特性参数对首波、尾波及调节时间的变化规律有不同的影响。
Aiming at the isolated hydroelectric power plant (HPP) with surge tank, this paper studies the regulation quality for frequency response of turbine regulating system under load disturbance. Firstly, the complete mathematical model of turbine regulating system is established and a fifth order frequency response under step load disturbance is derived. Then, the method of primary order reduction and secondary order reduction, for this complete fifth order system of frequency response, is proposed based on dominant poles. By this method, the complete fifth order system is solved and the regulation quality for frequency response is studied. The results indicate that the complete fifth order system always has a pair of dominant conjugate complex poles and three non-dominant poles. The primary fourth order equivalent system, which is obtained by primary order reduction, keeps the dominant poles almost unchanged, therefore it can represent and replace the complete fifth order system and it is obviously superior to other fourth order systems. The primary fourth order equivalent system is superimposed by two second-order subsystems, one of them is corresponding to two non-dominant real poles (i.e. head wave) and the other one is corresponding to a pair of dominant conjugate complex poles (i.e. tail wave), respectively. In the fluctuation process of frequency response, head wave decays very fast and works mainly in the beginning period while tail wave decays very slowly, fluctuates periodically and works throughout the period. The secondary order reduction of complete fifth order system can be conducted by using the second order system of tail wave, which is the main body of frequency response, to represent the fluctuation characteristics. The most important dynamic performance index that evaluates the regulation quality, i.e. settling time, is derived from the fluctuation equation of tail wave. The different characteristic parameters of turbine regulating system have different influences on the change rules of head wave, tail wave and settling time.
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影响因子：
6.6
作者：
A. Stanković;G. Tadmor;T. Sakharuk
通讯作者：
A. Stanković;G. Tadmor;T. Sakharuk
影响因子：
4.9
作者：
L. Jing;L. Ye;O. Malik;Y. Zeng
通讯作者：
L. Jing;L. Ye;O. Malik;Y. Zeng
影响因子：
2.6
作者：
Bevrani, H.;Ghosh, A.;Ledwich, G.
通讯作者：
Ledwich, G.
DOI：
10.1201/9781420009248
发表时间：
2007-05
期刊：
--
影响因子：
--
作者：
L. Grigsby
通讯作者：
L. Grigsby
DOI：
10.2307/3619533
发表时间：
2021-01
期刊：
--
影响因子：
--
作者：
Joseph A. Gallian
通讯作者：
Joseph A. Gallian